#pragma once

#include <iostream>
#include <fcntl.h>
#include <unistd.h>
#include <stdarg.h>

#define SIZE 1024
// 定义日志等级
#define Info 0
#define Debug 1
#define Warning 2
#define Error 3
#define Fatal 4

// 日志输出
#define Screen 1
#define Onefile 2
#define Classfile 3

#define LogFile "log.txt"

class Log
{
public:
    Log()
    {
        printMethod = Screen;
        path = "./log/";
    }
    void Enable(int method)
    {
        printMethod = method;
    }
    std::string LevelToString(int level)
    {
        switch (level)
        {
            case Info:
                return "Info";
            case Debug:
                return "Debug";
            case Warning:
                return "Warning";
            case Error:
                return "Error";
            case Fatal:
                return "Fatal";
            default:
                return "None";
        }
    }

    // void logmessage(int level, const char *format, ...)
    // {
    //     time_t t = time(nullptr);
    //     struct tm *ctime = localtime(&t);
    //     char leftbuffer[SIZE];
    //     snprintf(leftbuffer, sizeof(leftbuffer), "[%s][%d-%d-%d %d:%d:%d]", LevelToString(level).c_str(),
    //     ctime->tm_year + 1900, ctime->tm_mon + 1, ctime->tm_mday, ctime->tm_hour, ctime->tm_min, ctime->tm_sec);

    //     va_list s;
    //     va_start(s, format);
    //     char rightbuffer[SIZE];
    //     vsnprintf(rightbuffer, sizeof(rightbuffer), format, s);
    //     va_end(s);

    //     // 格式：默认部分 + 自定义部分
    //     char logtxt[SIZE * 2];
    //     snprintf(logtxt, sizeof(logtxt), "%s %s", leftbuffer, rightbuffer);
    //     // std::cout << logtxt << std::endl;
    //     printLog(level, logtxt);
    // }

    void printLog(int level, const std::string& logtxt)
    {
        switch (printMethod)
        {
            case Screen: // 向显示器打印
                std::cout << logtxt << std::endl;
            break;
            case Onefile: // 向一个文件中打印
                printOneFile(LogFile, logtxt);
            break;
            case Classfile: // 向多个文件中打印
                printClassFile(level, logtxt);
            break;
        }
    }

    void printOneFile(const std::string& logname, const std::string& logtxt)
    {
        std::string _logname = path += logname;
        int fd = open(_logname.c_str(), O_WRONLY|O_CREAT|O_APPEND, 0666);
        if(fd < 0) return;
        write(fd, logtxt.c_str(), logtxt.size());
        close(fd);
    }

    void printClassFile(int level, const std::string& logtxt)
    {
        std::string filename = LogFile;
        filename += ".";
        filename += LevelToString(level);
    }

    ~Log() 
    {}

    void operator()(int level, const char *format, ...)
    {
        time_t t = time(nullptr);
        struct tm *ctime = localtime(&t);
        char leftbuffer[SIZE];
        snprintf(leftbuffer, sizeof(leftbuffer), "[%s][%d-%d-%d %d:%d:%d]", LevelToString(level).c_str(),
        ctime->tm_year + 1900, ctime->tm_mon + 1, ctime->tm_mday, ctime->tm_hour, ctime->tm_min, ctime->tm_sec);

        va_list s;
        va_start(s, format);
        char rightbuffer[SIZE];
        vsnprintf(rightbuffer, sizeof(rightbuffer), format, s);
        va_end(s);

        // 格式：默认部分 + 自定义部分
        char logtxt[SIZE * 2];
        snprintf(logtxt, sizeof(logtxt), "%s %s", leftbuffer, rightbuffer);
        // std::cout << logtxt << std::endl;
        printLog(level, logtxt);
    }

private:
    int printMethod;
    std::string path;
};


